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Commit c5b0c09b authored by Jeeja KP's avatar Jeeja KP Committed by Takashi Iwai
Browse files

ALSA: hdac: Add snd_hdac_ext_bus_link_power_down_all() 



New HDA controllers like Skylake sport multiple HDA links, so we need a
helper to turn off all the links in one go while suspending the device so
add snd_hdac_ext_bus_link_power_down_all() API

Signed-off-by: default avatarJeeja KP <jeeja.kp@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent a7e3dd85

include/sound/hdaudio_ext.h

+1 −0
Original line number Diff line number Diff line
@@ -116,6 +116,7 @@ struct hdac_ext_link { 


int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link);

int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link);

int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus);

void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,

				 int stream);

void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,

sound/hda/ext/hdac_ext_controller.c

+20 −0
Original line number Diff line number Diff line
@@ -280,3 +280,23 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link) 
	return check_hdac_link_power_active(link, false);

}

EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);



/**

 * snd_hdac_ext_bus_link_power_down_all -power down all hda link

 * @ebus: HD-audio extended bus

 */

int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus)

{

	struct hdac_ext_link *hlink = NULL;

	int ret;



	list_for_each_entry(hlink, &ebus->hlink_list, list) {

		snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_SPA, 0);

		ret = check_hdac_link_power_active(hlink, false);

		if (ret < 0)

			return ret;

	}



	return 0;

}

EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all);